CONTINENTAL CONTROL SYSTEMS RWNB-3D-240-P, Installation Manual, Page: 12 / 16

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WattNode Models (1)
Watt-Hours per Pulse per CT Rated Amp (FSHz = 4.00)
Standard and
Option DPO Outputs
Option P3 :
Per-Phase Outputs
WNB-3Y-208-P 0.02500 0.008333
WNB-3Y-400-P 0.04792 0.01597
WNB-3Y-480-P 0.05771 0.01924
WNB-3Y-600-P 0.07229 0.02410
WNB-3D-240-P 0.02500 0.008333
WNB-3D-400-P 0.04792 0.01597
WNB-3D-480-P 0.05771 0.01924
Table 3: Watt-Hours per Pulse per CT Rated Amp (WHpPpA)
(1)
Note: the same scale factors also apply for revenue models starting with “RWNB”.
For example: a WNB-3Y-208-P with a full-scale pulse frequency of 4.00 Hz has a WHpPpA value
of 0.0250. With 15 amp CTs, it will output one pulse for every 0.375 watt-hours.
(0.025) • (15.0 amps) = 0.375 watt-hours
It is easy to use the WHpPpA value to compute energy over a time interval, where PulseCount is
the total count of pulses during the time interval (could be an hour, day, month, etc.):
Energy (Wh) = WHpPpA • CtAmps • PulseCount
4.5 Maintenance and Repair
The WattNode meter requires no maintenance. It is not user serviceable and there are no re-
placeable parts except the pluggable screw terminals. There are no diagnostic tests that can be
performed by the user, other than checking for errors via the status LEDs.
In the event of any failure, the meter must be returned for service (contact CCS for an RMA). For
a new installation, follow the troubleshooting instructions in the
Operating and Reference Guide
before returning the meter for service, to ensure that the problem is not connection related.
The WattNode meter should not normally need to be cleaned, but if cleaning is desired, power
must be disconnected first and a dry or damp cloth or brush should be used.
5 Specifications
The following is a list of basic specifications. For extended specifications, see the Operating and
Reference Guide .
5.1 Accuracy
The following accuracy specifications do not include errors caused by the current transformer ac-
curacy or phase angle errors. “Rated current” is the current that generates a CT output voltage of
0.33333 Vac.
Normal Operation:
●
Line voltage : -20% to +15% of nominal
●
Power factor : 1.0
●
Frequency : 48 - 62 Hz
●
Ambient Temperature : 23°C ± 5°C
●
CT Current : 5% - 100% of rated current
Accuracy: ±0.5% of reading
For accuracy at other conditions, see the reference guide.
WattNode Revenue Models:
●
Meets the ANSI C12.1-2008 standard for revenue metering when used with IEEE C57.13
class 0.6 current transformers. Includes a certificate of calibration.